FALCOXID.E-TIIE lALCoNS. 249 



oval, liorizoiitiil, with an cnikisciI carliliijiiiious tiibcrclo. [.oics iicai-lv iiaki'il, witli scant 

 brisdos. Willi;' Ion;,' (iiiiii-li as in liiite<i) ; lliu roiirlh oi' lil'lli (jnill lon}::L'St, ami ilic lirst 

 slinrtcr tiian the ciiilitli lo liic tculli : dutcr tbni' with iniicc \vi>1js siniialoil. Tail loiiir, 

 niDi'L" than two lliiids tlic winj;'; even or .sliulitly i-oiinili'il. Keel, roliiist, when onlsti'ctciicd 

 reai'liinjr nearly to the end of the tail ; tai'sns nearl}' twiei' tiie k'lijilh of tlu^ niiilille, vei y 

 robust, the frontal ami [wsterior rows ol' .seutelhe very ilistinet ; outer toe lonj^cr tiian tlie 

 inner; '■\:.\\& stronir, well curved, and aoute. iSexes alike; young and old [iluinafres very 

 dilfercnt. 



This genus indudes a single s]iecies,tlit> /*. unicinrtiiii,v;\\\\ its two climatic 

 races, itnicinrtus nl' Sontli America and /i((rrUi ul' ^liddle America. It is 

 most nearly related to the genus UnthitiiKjit, ol' tropical America, the sjiecies 

 of which are sluggish and almost Canicara-like in their habits, tliough they 

 are hardly more so than om' own JJii/iviirs. Tiie genus Ciut.rinx of (!oiild 

 having lieen i'omuled upon JJutro (/iildjiKi/onisis, a species strictly congeneric 

 with JJ. honaliti, it is neces.sary that a new generic name should lie instituted 

 for the present species, since it so well merits se])aration to that rank. I 

 accordingly propose the name given at the head of this chapter. 



Species and Raceo. 

 P. unicinctus. Wing. I Lb')- U.OH: tail. II.OO- ll.oii; eulinen. .8'J - l.IO; 

 tarsus, 'J.Tf*- .'!.7') ; middle toe. 1.52-2. 00. Adull. (general I'olor brownish- 

 black or blackish-brown, unifoini, or .slifi-htly variegated by liuht siwttinu; ; 

 the lesser wing-eoverts and tibi;i? deep rufous, or eheslimt. Tail black ; the 

 o!; '. and basi; while, as are also the lail-covcits. Yoiiikj. I'luiuagi' yieatiy 

 variegated. Above blackish-brown, the leathers edged with rusty; head 

 and neck .streaked with jiale oehraceous. Lower parts |>ale ochraeeous or 

 yellowish-white, the breast and abdomen with longitudinal ovoid sjiols of 

 blackish; tibia" with transver.-^e bars of dark rusty: lower tail-coverts with 

 black shaft-streaks. Lesser wing-covert region only washed with rufous. 

 Tail grayish-brown, whitish at the tip, and crossed by nariow bands of 

 dusky. 



xlf?M/< with the blackish much broken up by lighter spotting. Wing, 

 n.()0-14.G(); tail, 9.00- 1()..")0; culmen, .S2- l.O'i ; tarsus. 2.78- li.lO; 

 middle toe, 1.52- 1.8o. Ilah. South America . . var. u n i <■ i n rt u n} 



1 Falm unicinctus, Tl'.MM. PI. Col. 31;!, 1820. Mor/ilinii.i unicinc/iis, Lr.ss. Man. Oru. 1, 1>-<2S, 

 00. .■I.iliii- unicinclu.'i, Civ. l!i''g. An. (I'd. 2>, 1, 1^2!t, ;i;i2. -SriacKl.. Oni. Syn. I, 221. - 

 Kaci', Moiiog. Fale. 18,'pO, p. tiii. JIuIco iinicinc/us, (ir..\v, List H. lirit. Mus. 18.— In. ibuul 

 List, I, 7, No. .'),';. A'i.ius iinicinc/u.i, Li:.ss. Tr. Orii. p. 01. lIjqMmorphnus unicinclun, Tscufiir, 

 Fauna Per. pp. 17, S,"). S/iizdiirriinu.i vnicindiui, K.wv, Ui'b. Sciick. 184;'), 2(10. I'mliilini/ii 

 iinicinclii, L.\t'i!. IJi'V. Zoiil. 1840, 00.— Pf.i.z. tlrn. liras. 1, 1808, ;?, No. 10. -In. IV, 1871, 

 !i04. Pt.liihuiKs l(rniucii.i, Tsciltiii. Av. Comsi>. Wicgin. Arili. 1814, 2t;4. In. Kamia Per. jil. 

 ii, Jur. It scM'ius that the South Airn'ricaii birds of this spcc'ii-s iiivi'r attain the siniplr tricolorcd 

 ]ihnuag(' assiniicd by tin' adult of tin' North .Vun'rican I'onn, Tcnniiiuek's ligini' (PI. Col. ISP!) 

 rcpn-sc nting tin' in'arcst a|))iroa('li to it that 1 liavi' seen, in a large scries of adult specimens. 

 The following descriptions show the average adnll of var. unicinc/iii : — 



.Idnl/ male (No. IM.OOS, Chile ; Lieutenant CillissK HesoniMing the ininiatnre of var. harriii, 

 as deserilieil on ji. l.ltiO (No. .I'!,?!):!). Prinnnies edged terminally with wliitisli ; inmr welis 

 of tail-feathers mottled whitish for their basal half, not showing the regular transvi ise bars seen 

 ill tlip innnaturo of vnr. Iinrrisi ; under surface of )iriinario.s almost wholly wliite, breoiniiig 

 nshy, baiTi'd with du.sky, toward.s their ends. 'VVing, 12.00 ; tail, 8.30 ; tarsus, 2.00 ; iniddli' 



vol,. III. .32 



